Arrangement or grouping of the parts of the transmission-gear in motorcycles and gear-case therefor



F. AMIOT. ARRANGEMENT 0R GROUPING OFv THE PARTSOF THE .TRANSMISSION GEARIN MOTORCYCLES .AND GEAR cAsE nsemn.

APPLICATION FILED FEEL 14.' 1920.

Patented May il 192i.

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' of transmitting Fenix Airiof'r, or conoivrnns, Fammi-i.

ARRANGEL'IENT OR GROUPING'OF THE PARTS THE TRANSh'SSIQN-GEAR INlIJIOTORCYGLES AND GEAR-CASE THEREFOR. i

Application filed February 14, 1920. Serial No; 358,611.

To all whom it 'may concern: l

Be it known that l', FELIX Armor, citizen of the Republic of France, andresiding at Colombes, Seine, France, have invented Improvements in orRelating to the Arrangement or Grouping of the Parts of theTransmission-Gear in Motorcycles and in Gear-Cases Therefor, of whichthe following is a specification.

The characteristic feature of this improved grouping 'consists inarranging in the saine line, suitably set off relatively'to the symmetryaxis passing` through the -diametral plane of the wheels, thetransmission shaft in line with which are arranged the engine crankshaft,the clutch, the first shaft of the change speed box or theoperating shaft of any suitable control for the changespeed box, theball-and-socket joint, and the Cardan shaft xed to the parts for drivingthe toothed wheel xed to the driving wheel. The improved grouping allowsof balancing completely the masses relatively to the symmetry axis,while taking the driving couple into consideration, and of arranging theparts in a single gear-case having an externally regular shaperelatively to the symmetry axis.

ln the accompanying ldrawings which illustrate by way of example asuitable practical form of this invention Figure 1 is a side elevationof a motor cycle embodying the present improvements, and

AFig. 2 is a plan partly in section, the upper part of the gear-casebeing assumed to be removed to show the parts mounted in the latter.

The same numerals and letters o f reference indicate the same parts inboth the figures.

As shown', y, y is the symmetry axis passing through the diametral planeof the wheels a, b. m, is the axis ofthe transmission gear whichincloses with the symmetry axis y, y, a suitable angle'to allow themotion to the rear driving wheel a., In line with this axis 00, fr thereare arranged the crank shaft of the engine 1, the fly-wheel, the clutchl2, the primary shaft of the change speed box 3 or the operating shaft ofany suitable cha-nge speed gear, the ball-and-socket joint Il and theCardan shaft 5 that is fixed to the bevel pinion or to a worm such as 6,drivvice 10, a lighting dynamo 11, and an ex-` haust pot or silencer 12.Y

The above mentioned mechanical parts are arranged in a gear-case 13composed of two portions of which one portion m which constitutes thecover. proper of the gear- Speccaton of Letters Patent.v l Pzttnfd 17, I

A ingthe worm wheelfixed to the driving i case, terminates in a Joint ofcircular form a, forming in the bodyy of the gear-case a cylindricalportion whose axis may be at right angles to the symmetry axis, to thedriving shaft orto any other judiciously selected intermediate shaft.The center through which the axis of this cylinder passes is so locatedas to allow of obtaining an orifice suflicient for t e introduction andmounting of the parts contained in the gearcase. Similarly, the radiusis such that the circumference passes preferably through the center ofthe innerball bearings for` the purpose of facilitating their 'mountingcenter c may be situated slightly above the chord 29 p connectingtogether the two points of contact of maximum height so as to allow aVtight .joint to be made by the clamping action of bolts, such as .a

This gear-case has the characteristic feature 'of being of regular shape(apart from the constructional Vbearing bosses) relatively to thesymmetry axis y y.

surfaces of The likewise be so. arranged as to lThis gear-case 13 thuscontains all'the mechanical partsand in addition inthe case of motorcycles with change speed gear, it comprises the control for operatingthe clutch, the control for operating the change speed box, the controlfor operating the starting device, etc. It may also be arranged in sucha manner as to receive at 12 the silencer without altering itsy outwardappearance.

The cover of the gear-case may also comprisethe seating surfaces for themagneto, the inflator, the starting device and all other mechanicaldevices.

Having now particularly Idescribed and ascertained the nature of my saidinvention and in what manner the same is to be per formed, I declarethat what I claim is:

A motor cycle, in which the parts serving for the mechanicaltransmission of the driving power are arranged in a line suitably offsetrelatively to the axis of symmetry passing through the diametral planeof the wheels, and a single gear case of externally regular shaperelatively tothe symmetry axis wherein said transmission parts aredisposed, said gearcase being provided with a cover having the form of aspherical cap with L circular joint so as to allow a tight 15 closure ofthe said cover to be elfected by the clamping action of the fasteningbolts,

In testimony whereof I have signed my name to this specic'ation in thepresence of two subscribing witnesses.

FELIX AMIOT. Witnesses:

ANDR BORDILLON, J ULEs FAYOLLET.

